초록 ▼

A method of producing a package of a product, which product does not include a significant amount of gas, comprising taking a shape-retaining container having a charging opening, charging the container with the product to a level which leaves a substantial headspace and, in any suitable order, (a) c

A method of producing a package of a product, which product does not include a significant amount of gas, comprising taking a shape-retaining container having a charging opening, charging the container with the product to a level which leaves a substantial headspace and, in any suitable order, (a) completely sealing the opening with a closure of stretchable material, and (b) deforming the closure inwardly onto the product to reduce the headspace and continuing the deformation, to move product adjacent the closure into the remaining headspace, until the headspace is eliminated by the continued movement of product and closure, the method being such as to form a package which is substantially gas free and substantially hydraulically solid.

대표청구항 ▼

A method of producing a package of a product, which product does not include a significant amount of gas, comprising the steps of taking a shape retaining container made of a material which is softened at the temperature employed in heat-sterilization and which has a charging opening, charging the c

A method of producing a package of a product, which product does not include a significant amount of gas, comprising the steps of taking a shape retaining container made of a material which is softened at the temperature employed in heat-sterilization and which has a charging opening, charging the container with the product to a level which leaves a headspace, substantially eliminating permanent gas from the headspace, sealing the opening with a closure, and deforming the closure inwardly onto the product to reduce the headspace and continuing the deformation, to move product adjacent the closure into the remaining headspace, until the headspace is eliminated by the continued movement of product and closure, wherein: (a) the sealing step is achieved by heat-sealing the closure around the opening, (b) the closure is located against the sealing area of the container body before the headspace is eliminated, (c) the closure is of stretchable material and in the deformation step is stretched beyond its elastic limit so as not to tend to return to its original form, (d) the product charge is sufficiently liquid or mobile not to tend to assume any specific natural shape, (e) the sealed package is heat sterilized, resulting in softening of the container material, and (f) during heat sterilization an external pressure is maintained at least sufficient to prevent development of vapour in the package, whereby a sterilized package is produced in which the integrity of the seal is preserved and, despite said softening, the container has the same shape as it had prior to heat sterilization.